Design And Implementation Of PPP In μC/OS-Ⅱ Operating System

Nowadays, with the development of communication technology, network technology, semiconductor technology and embedded system technology, embedded system will have great influence on human life and change people's lifestyle continuedly in the future. But the embedded system isolated from Internet will not be suitable for the recent development trend. With the new requirements of "Ubiquitous Computing" and "Digital Family" coming on, the future embedded devices need to fulfill people's higher requirement. Not only do they have the capacity of traditional computing and controlling, but also they may access Internet. By using network resource, they will share information and more kinds of information service.For studying embedded system, it is a vital and basic step to port embedded operating system in relative processor. Furthermore, with great uses of Internet in life, making embedded devices access Internet is very important. In daily life, it is a very popular method to access Internet by Modem. Designing PPP to enable embedded devices to communicate with outside is very important. Under this circumstance, we come up with the research article: Design and implementation of PPP in μC/OS-II based on AMR7TDMI processor.Firstly, the structure of hardware platform of system, ARM7TDMI processor and relative instruction set are narrated. Then the functions of task management, clock management, interrupt management, memory management and communications between both tasks are analysed, which will provide the foundation for design and...